The pathogen was identified as cucumber target leaf spot according to Koch's Postulation and biological characteristics. 根据柯赫氏法则和生物学特性，鉴定为黄瓜褐斑病，又叫靶斑病。
The root yield and sugar content of tetraploid lines were higher than that of diploid lines.However, the Cercospora leaf spot resistance had no significant differences. 四倍体品系的根产量和含糖率均优于二倍体材料，而褐斑病抗性差别不大。
